MISSISIPI TORNADO EMERGENCY

• It is a small-diameter column of violently rotating air developed within a convective cloud and in contact with the ground
• Tornadoes occur most often in association with thunderstorms during the spring and summer in the mid-latitudes of both the Northern and Southern Hemisphere
• These whirling atmospheric vortices can generate the strongest winds known on Earth: wind speeds in the range of 500 km (300 miles) per hour have been measured in extreme events
• Tornadoes have diameters on the scale of 100s of meters and are produced from a single convective storm (i.e. a thunderstorm or cumulonimbus). A tropical cyclone, however, has a diameter on the scale of 100s of *kilometres* and is comprised of several to dozens of convective storms

• Hurricanes, cyclones and typhoons are all types of tropical storms
• They are all basically the same thing, but are given different names depending on where they appear
• Hurricanes are tropical storms that form over the North Atlantic Ocean and Northeast Pacific
• Cyclones are formed over the South Pacific and Indian Ocean
• Typhoons are formed over the Northwest Pacific Ocean
• Cyclone, Typhoon, and Hurricane are all the same weather phenomenon. They are named differently because of their locations.
  Tornado is a different kind of storm
• Tornadoes and typhoons are both storms formed by rapidly rotating storm systems created by warm, humid air rising as it collides with cold air
• Tornadoes occur in many parts of the world, including Australia, Europe, Africa, Asia, and South America. Even New Zealand reports about 20 tornadoes each year. Two of the highest concentrations of tornadoes outside the U.S. are Argentina and Bangladesh

• Fronts and air masses are two key concepts in understanding weather patterns
• An air mass is a large body of air with similar temperature and moisture properties
• Fronts are boundary zones between two different air masses
• The type of front that forms depends on the difference in temperature between the two air masses

• An air mass is a body of air with a relatively constant temperature and moisture content over a significant altitude
• 6.Air masses typically cover hundreds, thousands, or millions of square kilometres
• 7.A front is a boundary at which two air masses of different temperatures and moisture content meet

• The World Meteorological Organization (WMO) is an intergovernmental organization with a membership of 193 Member States and Territories
• It originated from the International Meteorological Organization (IMO), the roots of which were planted at the 1873 Vienna International Meteorological Congress
• Established by the ratification of the WMO Convention on 23 March 1950, WMO became the specialised agency of the United Nations for meteorology (weather and climate), operational hydrology and related geophysical sciences a year later
•  The Secretariat, headquartered in Geneva, is headed by the Secretary-General. Its  supreme body is the World Meteorological Congress

• WMO provides world leadership and expertise in international cooperation in the delivery and use of high-quality, authoritative weather, climate, hydrological and related environmental services by its Members, for the improvement of the well-being of societies of all nations
• WMO works to facilitate worldwide cooperation in the design and delivery of meteorological services, foster the rapid exchange of meteorological information, advance the standardization of meteorological data, build cooperation between meteorological and hydrological services, encourage research and training in meteorology, and expand the use of meteorology to benefit other sectors such as aviation, shipping, agriculture and water management
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